So... $387,500 is the purchase price
The seller's side receives 2.5% of the purchase price (which is what's left after paying the buyer's side 3.5%) which is $9,687.50.
You're entitled to 92% of that (per your agreement with your brokerage) which is a total of $8912.50. Congratulations!
Make sure you set enough aside to pay your federal income taxes.